200 150 2013 Goods per day ($) 100 D 50 A 1900 0 14 17 19 22 24 Free time per day 1. The above graph shows the bundle of goods per day and free time per day in a country between 1900 and 2013. When thinking about the difference between 1900 and 2013, which effect is more important on net, the income effect or the substitution effect